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학술저널
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한국미생물생명공학회 한국미생물·생명공학회지 한국미생물·생명공학회지 제37권 제2호
발행연도
2009.1
수록면
176 - 182 (7page)

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Hydrogen producing bacterium, strain MeL 6-2 was isolated from the sludge of the factory areas in Anyang through the acclimation in basal salt medium (BSM) supplemented with 10 g/L of sucrose. Isolated strain MeL 6-2 was a facultative anaerobe which could grow in both aerobic and anaerobic environments. An aerobically grown pure culture isolated from enriched culture was analyzed by 16S rDNA sequencing and identified as Rhodopseudomonas sp. MeL 6-2. Effects of the concentrations of glucose and sucrose on the hydrogen production rate and the hydrogen production yield were investigated. When glucose in the range of 1~12 g/L was supplemented to the BSM, strain MeL 6-2 could grow without lag phase. An increased glucose concentration increased the specific hydrogen production rate linearly to 4.2 mmol-H2·L-1·h-1 at 10 g/L, and 60 mmol-H2·mg-DCW-1·h-1, but decreased slightly as the concentration increased to 12 g/L. The hydrogen production yield was maintained over a range from 2.6 to 3.1 mol-H2·mol-glucose-1. When sucrose in the range of 1~12 g/L was supplemented to the BSM, strain MeL 6-2 could grow after ten hours. An increased sucrose concentration increased the specific hydrogen production rate and the hydrogen production yield to 16 3mmol-H2·mg-DCW-1·h-1 and to 4.5 mol-H2·mol-sucrose-1, respectively.

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